硝酸钝化对304不锈钢在模拟混凝土孔隙液中点蚀的临界Cl-浓度的影响

安易强, 王昕, 崔中雨

Effect of Nitric Acid Passivation on Critical Cl- Concentration for Corrosion of 304 Stainless Steel in Simulated Concrete Pore Solution

AN Yiqiang, WANG Xin, CUI Zhongyu

表1 经不同时间钝化处理的304不锈钢在0.5 mol/L NaCl溶液中的EIS拟合结果

Table 1 Fitting results of EIS passivated 304 stainless steel after passivation for different time in 0.5 mol/L NaCl solution

Time / h Rs / Ω·cm2 Qf / 10-5 Ω-1·cm-2·sn n Rf / 105 Ω·cm2 0 6.8 5.3 0.92 1.1 0.5 6.1 3.7 0.93 7.7 2 7.9 3.3 0.81 4.0 24 7.5 9.4 0.84 1.9